<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			*{
				padding: 0;
				margin: 0;
			}
			.aa{
				width: 500px;
				height: 300px;
				border: 1px;
				background-color: red;
				position: relative;
				margin-left: 500px;
			}
			.bb{
				width: 30px;
				height: 70px;
				background-color: aqua;
				color: black;
				text-align: center;
				line-height: 70px;
				position: absolute;
				top: 100px;
				border-radius: 0 5px 5px 0;
			}
			.cc{
				width: 30px;
				height: 70px;
				border: 1px;
				background-color: aqua;
				color: black;
				position: absolute;
				text-align: center;
				line-height: 70px;
				top: 100px;
				left: 470px;
				border-radius: 5px 0 0 5px;
			}
			.dd{
				position: absolute;
				top:250px;
				left: 140px;
		
			}
			.dd>li{
			border: 1px red;
			width: 20px;
			height: 20px;
			border-radius: 20px;
			background-color:#FFFFFF;
			list-style: none;
			display: inline-block;
			margin-left: 30px;
			}
			.dd>li:hover{
				background-color:red;
				width: 30px;
				height: 30px;
			}
		</style>
	</head>
	<body>
		<div class="aa">
			<div class="bb">&lt;</div>
			<div class="cc">&gt;</div>
			<ul class="dd">
				<li></li>
				<li></li>
				<li></li>
				<li></li>
			</ul>
		</div>
	</body>
</html>
